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<title>Closure Unit Tests - goog.math.Line</title>
<script src="../base.js"></script>
<script>
  goog.require('goog.math.Coordinate');
  goog.require('goog.math.Line');
  goog.require('goog.testing.jsunit');
</script>
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<script>

  function testEquals() {
    var input = new goog.math.Line(1, 2, 3, 4);

    assert(input.equals(input));
  }

  function testClone() {
    var input = new goog.math.Line(1, 2, 3, 4);

    assertNotEquals('Clone returns a new object', input, input.clone())
    assertTrue('Contents of clone match original', input.equals(input.clone()));
  }

  function testGetLength() {
    var input = new goog.math.Line(0, 0, Math.sqrt(2), Math.sqrt(2));
    assertRoughlyEquals(input.getSegmentLengthSquared(), 4, 1e-10);
    assertRoughlyEquals(input.getSegmentLength(), 2, 1e-10);
  }

  function testGetClosestPoint() {
    var input = new goog.math.Line(0, 1, 1, 2);

    var point = input.getClosestPoint(0, 3);
    assertRoughlyEquals(point.x, 1, 1e-10);
    assertRoughlyEquals(point.y, 2, 1e-10);
  }

  function testGetClosestSegmentPoint() {
    var input = new goog.math.Line(0, 1, 2, 3);

    var point = input.getClosestSegmentPoint(4, 4);
    assertRoughlyEquals(point.x, 2, 1e-10);
    assertRoughlyEquals(point.y, 3, 1e-10);

    point = input.getClosestSegmentPoint(new goog.math.Coordinate(-1, -10));
    assertRoughlyEquals(point.x, 0, 1e-10);
    assertRoughlyEquals(point.y, 1, 1e-10);
  }
</script>
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